*
* Licensed under GPLv2, see file LICENSE in this source tree.
*/
+//config:config ACPID
+//config: bool "acpid (8.7 kb)"
+//config: default y
+//config: select PLATFORM_LINUX
+//config: help
+//config: acpid listens to ACPI events coming either in textual form from
+//config: /proc/acpi/event (though it is marked deprecated it is still widely
+//config: used and _is_ a standard) or in binary form from specified evdevs
+//config: (just use /dev/input/event*).
+//config:
+//config: It parses the event to retrieve ACTION and a possible PARAMETER.
+//config: It then spawns /etc/acpi/<ACTION>[/<PARAMETER>] either via run-parts
+//config: (if the resulting path is a directory) or directly as an executable.
+//config:
+//config: N.B. acpid relies on run-parts so have the latter installed.
+//config:
+//config:config FEATURE_ACPID_COMPAT
+//config: bool "Accept and ignore redundant options"
+//config: default y
+//config: depends on ACPID
+//config: help
+//config: Accept and ignore compatibility options -g -m -s -S -v.
+
+//applet:IF_ACPID(APPLET(acpid, BB_DIR_SBIN, BB_SUID_DROP))
+
+//kbuild:lib-$(CONFIG_ACPID) += acpid.o
//usage:#define acpid_trivial_usage
-//usage: "[-d] [-c CONFDIR] [-l LOGFILE] [-a ACTIONFILE] [-M MAPFILE] [-e PROC_EVENT_FILE] [-p PIDFILE]"
+//usage: "[-df] [-c CONFDIR] [-l LOGFILE] [-a ACTIONFILE] [-M MAPFILE] [-e PROC_EVENT_FILE] [-p PIDFILE]"
//usage:#define acpid_full_usage "\n\n"
//usage: "Listen to ACPI events and spawn specific helpers on event arrival\n"
+//usage: "\n -d Log to stderr, not log file (implies -f)"
+//usage: "\n -f Run in foreground"
//usage: "\n -c DIR Config directory [/etc/acpi]"
-//usage: "\n -d Don't daemonize, (implies -f)"
//usage: "\n -e FILE /proc event file [/proc/acpi/event]"
-//usage: "\n -f Run in foreground"
//usage: "\n -l FILE Log file [/var/log/acpid.log]"
//usage: "\n -p FILE Pid file [/var/run/acpid.pid]"
//usage: "\n -a FILE Action file [/etc/acpid.conf]"
static const struct acpi_event f_evt_tab[] = {
{ "EV_KEY", 0x01, "KEY_POWER", 116, 1, "button/power PWRF 00000080" },
{ "EV_KEY", 0x01, "KEY_POWER", 116, 1, "button/power PWRB 00000080" },
+ { "EV_SW", 0x05, "SW_LID", 0x00, 1, "button/lid LID0 00000080" },
};
struct acpi_action {
char *handler = xasprintf("./%s", event);
const char *args[] = { "run-parts", handler, NULL };
- // debug info
- if (option_mask32 & OPT_d) {
- bb_error_msg("%s", event);
- }
+ // log the event
+ bb_error_msg("%s", event);
// spawn handler
// N.B. run-parts would require scripts to have #!/bin/sh
}
if (buf) {
- if (strncmp(buf, evt_tab[i].desc, strlen(buf)) == 0) {
+ if (is_prefixed_with(evt_tab[i].desc, buf)) {
action = evt_tab[i].desc;
break;
}
int acpid_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int acpid_main(int argc UNUSED_PARAM, char **argv)
{
- struct input_event ev;
int nfd;
int opts;
struct pollfd *pfd;
const char *opt_action = "/etc/acpid.conf";
const char *opt_map = "/etc/acpi.map";
#if ENABLE_FEATURE_PIDFILE
- const char *opt_pidfile = "/var/run/acpid.pid";
+ const char *opt_pidfile = CONFIG_PID_FILE_PATH "/acpid.pid";
#endif
INIT_G();
- opt_complementary = "df:e--e";
- opts = getopt32(argv, "c:de:fl:a:M:" IF_FEATURE_PIDFILE("p:") IF_FEATURE_ACPID_COMPAT("g:m:s:S:v"),
+ opts = getopt32(argv, "^"
+ "c:de:fl:a:M:"
+ IF_FEATURE_PIDFILE("p:")
+ IF_FEATURE_ACPID_COMPAT("g:m:s:S:v")
+ "\0"
+ "df:e--e",
&opt_dir, &opt_input, &opt_logfile, &opt_action, &opt_map
IF_FEATURE_PIDFILE(, &opt_pidfile)
IF_FEATURE_ACPID_COMPAT(, NULL, NULL, NULL, NULL)
);
if (!(opts & OPT_f)) {
+ /* No -f "Foreground", we go to background */
bb_daemonize_or_rexec(DAEMON_CLOSE_EXTRA_FDS, argv);
}
if (!(opts & OPT_d)) {
+ /* No -d "Debug", we log to log file.
+ * This includes any output from children.
+ */
+ xmove_fd(xopen(opt_logfile, O_WRONLY | O_CREAT | O_APPEND), STDOUT_FILENO);
+ xdup2(STDOUT_FILENO, STDERR_FILENO);
+ /* Also, acpid's messages (but not children) will go to syslog too */
openlog(applet_name, LOG_PID, LOG_DAEMON);
logmode = LOGMODE_SYSLOG | LOGMODE_STDIO;
- } else {
- xmove_fd(xopen(opt_logfile, O_WRONLY | O_CREAT | O_TRUNC), STDOUT_FILENO);
}
+ /* else: -d "Debug", log is not redirected */
parse_conf_file(opt_action);
parse_map_file(opt_map);
xchdir(opt_dir);
+ /* We spawn children but don't wait for them. Prevent zombies: */
bb_signals((1 << SIGCHLD), SIG_IGN);
- bb_signals(BB_FATAL_SIGS, record_signo);
+ // If you enable this, (1) explain why, (2)
+ // make sure while(poll) loop below is still interruptible
+ // by SIGTERM et al:
+ //bb_signals(BB_FATAL_SIGS, record_signo);
pfd = NULL;
nfd = 0;
int fd;
char *dev_event;
- dev_event = xasprintf((option_mask32 & OPT_e) ? "%s" : "%s%u", opt_input, nfd);
+ dev_event = xasprintf((opts & OPT_e) ? "%s" : "%s%u", opt_input, nfd);
fd = open(dev_event, O_RDONLY | O_NONBLOCK);
if (fd < 0) {
if (nfd == 0)
bb_simple_perror_msg_and_die(dev_event);
break;
}
+ free(dev_event);
pfd = xrealloc_vector(pfd, 1, nfd);
pfd[nfd].fd = fd;
pfd[nfd].events = POLLIN;
write_pidfile(opt_pidfile);
- while (poll(pfd, nfd, -1) > 0) {
+ while (safe_poll(pfd, nfd, -1) > 0) {
int i;
for (i = 0; i < nfd; i++) {
- const char *event = NULL;
-
- memset(&ev, 0, sizeof(ev));
-
- if (!(pfd[i].revents & POLLIN))
- continue;
+ const char *event;
+
+ if (!(pfd[i].revents & POLLIN)) {
+ if (pfd[i].revents == 0)
+ continue; /* this fd has nothing */
+
+ /* Likely POLLERR, POLLHUP, POLLNVAL.
+ * Do not listen on this fd anymore.
+ */
+ close(pfd[i].fd);
+ nfd--;
+ for (; i < nfd; i++)
+ pfd[i].fd = pfd[i + 1].fd;
+ break; /* do poll() again */
+ }
+ event = NULL;
if (option_mask32 & OPT_e) {
char *buf;
int len;
if (len >= 0)
buf[len] = '\0';
event = find_action(NULL, buf);
+ free(buf);
} else {
+ struct input_event ev;
+
if (sizeof(ev) != full_read(pfd[i].fd, &ev, sizeof(ev)))
continue;
}
if (!event)
continue;
- // spawn event handler
+ /* spawn event handler */
process_event(event);
}
}
if (ENABLE_FEATURE_CLEAN_UP) {
- while (nfd--) {
- if (pfd[nfd].fd) {
- close(pfd[nfd].fd);
- }
- }
+ while (nfd--)
+ close(pfd[nfd].fd);
free(pfd);
}
remove_pidfile(opt_pidfile);
projects / oweals / busybox.git / blobdiff